unrecognized option `--help'

missing --triple flag
missing --output flag
ghc-toolchain
  -t TRIPLE  --triple=TRIPLE                        Target triple
  -T PREFIX  --target-prefix=PREFIX                 A target prefix which will be added to all tool names when searching for toolchain components
             --llvm-triple=LLVM-TRIPLE              LLVM Target triple
  -v[N]      --verbose[=N]                          set output verbosity
             --keep-temp                            do not remove temporary files
  -o OUTPUT  --output=OUTPUT                        The output path for the generated target toolchain configuration
             --enable-unregisterised                Enable unregisterised backend
             --disable-unregisterised               Disable unregisterised backend
             --enable-tables-next-to-code           Enable info-tables-next-to-code optimisation
             --disable-tables-next-to-code          Disable info-tables-next-to-code optimisation
             --enable-libffi-adjustors              Enable the use of libffi for adjustors, even on platforms which have support for more efficient, native adjustor implementations.
             --disable-libffi-adjustors             Disable the use of libffi for adjustors, even on platforms which have support for more efficient, native adjustor implementations.
             --enable-ld-override                   Enable override gcc's default linker
             --disable-ld-override                  Disable override gcc's default linker
             --enable-locally-executable            Enable the use of a target prefix which will be added to all tool names when searching for toolchain components
             --disable-locally-executable           Disable the use of a target prefix which will be added to all tool names when searching for toolchain components
             --cc=CC                                Path of C compiler
             --cc-opt=OPTS                          Flags to pass to cc
             --cpp=CPP                              Path of C preprocessor
             --cpp-opt=OPTS                         Flags to pass to cpp
             --hs-cpp=HS-CPP                        Path of Haskell C preprocessor
             --hs-cpp-opt=OPTS                      Flags to pass to hs-cpp
             --js-cpp=JS-CPP                        Path of JavaScript C preprocessor
             --js-cpp-opt=OPTS                      Flags to pass to js-cpp
             --cmm-cpp=CMM-CPP                      Path of C-- C preprocessor
             --cmm-cpp-opt=OPTS                     Flags to pass to cmm-cpp
             --cxx=CXX                              Path of C++ compiler
             --cxx-opt=OPTS                         Flags to pass to cxx
             --cc-link=CC-LINK                      Path of C compiler for linking
             --cc-link-opt=OPTS                     Flags to pass to cc-link
             --ar=AR                                Path of ar archiver
             --ar-opt=OPTS                          Flags to pass to ar
             --ranlib=RANLIB                        Path of ranlib utility
             --ranlib-opt=OPTS                      Flags to pass to ranlib
             --nm=NM                                Path of nm archiver
             --nm-opt=OPTS                          Flags to pass to nm
             --readelf=READELF                      Path of readelf utility
             --readelf-opt=OPTS                     Flags to pass to readelf
             --merge-objs=MERGE-OBJS                Path of linker for merging objects
             --merge-objs-opt=OPTS                  Flags to pass to merge-objs
             --llc=LLC                              Path of LLVM llc utility
             --llc-opt=OPTS                         Flags to pass to llc
             --opt=OPT                              Path of LLVM opt utility
             --opt-opt=OPTS                         Flags to pass to opt
             --llvm-as=LLVM-AS                      Path of Assembler used for LLVM backend (typically clang)
             --llvm-as-opt=OPTS                     Flags to pass to llvm-as
             --windres=WINDRES                      Path of windres utility
             --windres-opt=OPTS                     Flags to pass to windres
             --ld=LD                                Path of linker
             --ld-opt=OPTS                          Flags to pass to ld
             --otool=OTOOL                          Path of otool utility
             --otool-opt=OPTS                       Flags to pass to otool
             --install-name-tool=INSTALL-NAME-TOOL  Path of install-name-tool utility
             --install-name-tool-opt=OPTS           Flags to pass to install-name-tool